Using PXI 6711

Hello, I am using a PXI system including a 6711 card, and Windows XP.
On Labview, when I try to generate a square signal at 100 kHz, all the system crashes or slows because of a too high computer time used (that prevent any further tasks running on the same system). I tried to find some examples on NI websites on how to use this specific card (obviously in more efficient way I use), but I could not find any. Can you help by providing a basic example that generate square signal without such desagrements?
Thank you for your attention.

In LabVIEW, go to Help>>Find Examples. Navigate to Hardware Input and Output>>Traditional DAQ>>Multiple Device. There is an example there called "Two E Series Shared Scan Clock". That example is for analog input, but you should be able to modify it to be for analog output. Basically you will just have to share the scan clock from one board(master) and use it as an 'external' clock for the other board(slave).
-Alan A.

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Simultaneous updation of sine wave using 2 PXI-6711 cards using RTSI Trigger

Hi ,
How to generate continuous sine wave using two pxi-6711 cards at same time without any phase shift using traditional nidaq functions.
Regards,
satya

In LabVIEW, go to Help>>Find Examples. Navigate to Hardware Input and Output>>Traditional DAQ>>Multiple Device. There is an example there called "Two E Series Shared Scan Clock". That example is for analog input, but you should be able to modify it to be for analog output. Basically you will just have to share the scan clock from one board(master) and use it as an 'external' clock for the other board(slave).
-Alan A.

How to count number of edges using PXIe-6363 Counters

Hello,
I am trying to count number of edges in a test signal in a 50 ms duration. I am using PXIe-6363 card and connecting the test signal to CTR 0 SRC (PFI 8). Is it a correct connection? What else do I need hardware-wise to make a correct set up for this application?
Thanks
Jeet
Solved!
Go to Solution.

Hi Jeet,
When you say interrupt signal, do you mean a pulse that will pause your counter task? If that is the case, and you want to pause your task with a digital pulse, you need to use the DAQmx Trigger Property Node and set that to Pause, Trigger Type. As you said, you can connect that signal coming from the chip to any PFI line and then set that line as the source of the property node.
There is an example that you can use that does exactly what I just described. This example is called Count Digital Events-Pause Trig.vi, and you can find it by going to Help>Find Examples..., then on the NI Example Finder window go to the Browse tab and navigate in the folders to Hardware Input and Outpout\DAQmx\Counter Measurements\Count Digital Events.
Regards.
Jorge
Applications Engineer
National Instruments
Certified LabVIEW Associate Developer (CLAD)

Can i use PXIe-1073 with an embedded PXIe controller PXIe-8108

I have a PXI express chassis PXIe-1073 with an integrated controller MXI-Express controller PCIe-8361. I now want to use the chassis as a standalone system with an embedded controller.
(a)Can i use PXIe-1073 chassis with PXIe-8108 embedded controller
(b)Can i use a windows based laptop to control the PXIe-1073 via the PCIe-8361 integrated controller.

Hello kanad,
The PXIe-1073 is a MXI-integrate chassis. This means that the MXI card that would normally go into the controller slot (slot 1) is built into the chassis. The PCIe-8361 or Expresscard8360 are placed into the desktop or laptop, respectively, and connect to the chassis. The cards in the PXIe-1073 then appear as if they are part of the desktop of laptop.
Since the controller is built into the chassis, the PXIe-1073 does not have a slot 1. Controllers, such as the 8108 can only be plugged into slot 1. Therefore, the PXIe-1073 can only be controlled by the desktop or laptop MXI link. It cannot run standalone with an embedded controller.
Consider reading page 1-3 and 1-6 in the manual below:
NI PXIe-1073 User Manual and Specifications
Regards,
George T.
Applications Engineering Specialist
National Instruments UK and Ireland

Using PXI 7352 Motion card and 6025E DAQ

Dear Sir,
I am using SCXI 1520 along with PXI 1011 & E Series DAQ (6025E) to measure the Load Value of a load cell. I am also using PXI 7352 Motion card to control the velocity of a Plunger. Now my requirement is to stop the movement of the Plunger depending on the value I read from the load cell. I am not able to achieve the stoping accuracy for high speeds (around 150mm/sec) in the software. Can it be possible with the use of Motion Control card and RTSI signals? If so, how can I do that? (I am not used any limit switches as the load value at which the Plunger should stop is user programmable and I am using DAQ card in Multiplexed mode because i am reading more number of analog inputs with only one DAQ card)
Ramkumar. D
Soliton Automation,
India.

Hello.
Based on your post I am guessing that you are performing the control in software, i.e. starting a velocity move, and then reading the load cell until it reaches a threshold, then stopping the motion. As such you are essentially limited by the software control loop rates.
You are using PXI so it is possible that you are using real-time. If not, one solution could be to implement a real-time application that would be more deterministic, but again this would still depend on the software.
Depending on your system (stepper or servo), you could implement a direct analog feedback into the motion card itself, but this would require a signal which has a range much greater than your load cells. This is only a good option for servo axes. If this was somehow possible, you can tell the motion controller to move to a specified LOAD instead of a specified position/velocity. Provided you could appropriately condition the signal, this is the best choice.
Unfortunately, you cannot implement limit switches/etc over RTSI, so I believe that this will not be a good option.
A third, and probably most un-desireable option, is to output a voltage on the PXI-6025E proportional to the load received from the load cell. This voltage could then be used as the analog feedback for your motion device. This, however, still adds the software layer of delays.
I hope these ideas help you out.
Regards,
Colin C.
Applications Engineering
Colin Christofferson
Community Web Marketing
Blog

How to use PXI 6071E daq card to complete multichannels scan with high sampling speed

I used pxi 6071E daq card to acquire 115v 400hz AC signals.when I use mutichannel scan function,I find that the voltage of waveforms have much more error.The voltage error is about 0~15v.please you can tell me why this happened?how to solve it.
Attachments:
多通道监测4.vi ‏199 KB

Sunny;
As you are scanning multiple channels and the signal range is high, you can try to set the interchannel delay a little higher. The interchannel delay is the time which the multiplexer will take to switch to the next channel. If that time is to short, the instrumentation amplifier can have problems to settle, and then an error at the reading will happen.
You can change the Interchannel delay at the AI Config.vi.
Hope this helps.
Filipe

Using Calibration Executive for PXI-5610 using PXI-5124

Hi guys,
We've been trying to calibrate PXI-5610 but the Calibration Executive software pop up an error of PXI-5122 requirement but we don't have the module, we have the PXI-5124 instead. We have tried to use the unsupport but it's not working too.
We have found that their resolutions are different
PXI 5124 http://sine.ni.com/nips/cds/view/p/lang/en/nid/14231
PXI 5122 http://sine.ni.com/nips/cds/view/p/lang/en/nid/12615
Is this the cause of error? Is it possible to use PXI-5124 instead of PXI-5122?
FYI about our system
Chassis PXI-1010
Software: Calibration Executive 3.3
For any further recommendations, please let us know, thanks in advance.

Hi, somebody here?
I'm not sure if we have specified forum for this issue, please help let me know.
Thanks...

How to use PXI-8532 in LabVIEW Development Environment?

Hi,
I want to know how to use PXI-8532 in LabVIEW Development Environment.
I'm using
1. Windows7 32bit
2. LabVIEW Pro 2012 SP1 32bit
3. NI-Industrial Communications for DeviceNet 2.3
4. PXIe-1062Q
5. PXIe-8135
6. PXI-8532 *2 (Names are "dnet0" and "dnet1".)
* Both PXI-8532 are installed in the same chassis (PXIe-1062Q).
I want to construct the system that "dnet0" sends data, and "dnet1" receives it. The data type I want to use is an array of bools.
I made VI (test.vi), but it does not work.
Could you tell me the reason why my VI doesn't work correctly.
Thank you so much for your help and time.
Best Regards,
volcanon2
Attachments:
test.vi ‏28 KB

activeX

Using PXI 6541 in real time applications

Hi,
I am using PXI 6541 for data acquisition from an electronic card. Electronic card generates an interrupt signal and PXI acquire data when it gets interrupt signal. The interrupt signal is generated 1 KHz. But using my windows XP, I cannot acquire data on this high rate. The highest rate that I can acquire data is 50 Hz. If I want to acquire data with 1 K Hz, from electronic card using PXI 6541 and using Windows XP, What Should I do.

Are you trying to use the 'interrupt signal' as a sample clock for your acquisition? If so, you should be able to route the signal to the PFI input and configure it as the sample clock.
As mentioned in your other thread (http://forums.ni.com/t5/Digital-I-O/Using-PXI-6541-in-real-time-applications/m-p/2561885), I would also recommend looking through some of the examples to get a starting point for your application.
James K.
National Instruments
Applications Engineer

Using PXI 6541 in real time applications

Hi,
I want to use PXI 6541 in real time mood, can it be used in real time applications.

I am using PXI 6541 for data acquisition from an electronic card. Electronic card generates an interrupt signal and PXI acquire data. The interrupt signal is generated 1 KHz. But using my windows XP, I cant acquire data on this rate. The highest rate that I can acquire data is 50 Hz. If I want to acquire data with 1 K Hz, from electronic card using PXI 6541 and using Windows XP, What Should I do.

Multiple data acquisition using PXI-5124 digitizer

I have a system in which I do data acquisition of the present state of the physical system (using PXI-5124 digitizer),
give the system some change (using labview program itself) and do data data acquisition again corresponding to
the changed state of the system.
So I need to do two data acquisitions in one loop. How do I do this ? Labview examples have some programs (attached file) that
does one data acquisition in one loop but I need to do two.
I tried to make some changes to this program but it doesn't seem to work well.
Thanks
Attachments:
PXI5124-data-acquisition.vi ‏46 KB

From the explanation you have given about reconfiguring the digitizer,
I think the example you are looking at is the one you want.
The digitizer is reconfigured with new settings every time with in that loop,
so the user can change the settings such as triggers and vertical range on the fly.
The original state of the example showed how it was reconfiguring the digitizer,
was there something else you wanted to add to that example?

How to use PXIe-5673e to continously generate dual-tone waveform?

Hi, everyone!
I want to use PXIe-5673e to continously generate dual-tone waveform, and I have see some examples of RFSG, but I still don't know which one to use, can someone help me?
Thank you very much!!

See if this example VI helps
Ches this one too

Conflict between the saved data and the sampling rate and samples to read using PXI 6070e

Hello, I am using PXI 6070e to read an analog voltage. I was sampling at 6.6 MHz and the samples to read were 10. So, that means it should sample 10 points every 1.5 um. The x-axis of the graph on the control panel was showing ns and us scale, which I think because of the fast sampling and acquiring data. I use "write to measurement file" block to save the data. However, the data was saved every 0.4 second and as 35 points data at the beginning of each cycle (e.g. 35 points at 0.4 sec and 35 at 0.8 sec, and so on) and there was no data in between. Can anyone help me how there are 35 reading points every cycle? I could not find the relation between the sampling rate and samples to read, to 35 points every 0.4 second!
Another thing, do I need to add a filter after acquiring the data (after the DAQ assistant block)? Is there anti-aliasing filter is built in PXI 6070e?
Thanks for the help in advance,
Alaeddin

I'm not seeing anything that points to this issue. Your DAQ is set to continuous acquire. I'm not sure if this is really what you want because your DAQ buffer will keep overwriting. You probably just want to set to Read N Samples.
I'm not a fan of using the express VIs. And since you are writing to a TDMS file, I would use the Stream to TDMS option in DAQmx. If you use the LabVIEW Example Finder, search for "TDMS Log" for a list of some good examples.
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Using PXI Star line for Sample CLK with 6551.

Using PXI Star line for Sample CLK with 6551.
Im trying to clock 5 6551s in a PXI-1006 chassis and a5404 in slot 2. I have configured the 6551s to use the start line as the sample clock but I still get the error
Possible reason(s):
Driver Status: (Hex 0xBFFA49B5) DAQmx Error -200586 occurred:
Hardware clocking error occurred.
If you are using an external sample clock, make sure it is connected and within specifications. If you are generating your sample clock internally, please contact National Instruments Technical Support.
Device: PXI2Slot17
Status Code: -200586
Any ideas why?
Thanks,
Brian

Nevermind...problem solved. I was exporting the wrong signal to the star line.
Brian
Message Edited by BrianPack on 11-28-2005 12:07 PM

Acquire single point 12 bit data @ 200Khz using PXIe 6535 DIO RT

I want to acquire single point 12 bit data @ 200Khz using PXIe 6535 DIO, PXIe 1072 chasis and 8820 controller in RT. Problem is I am unable to acquire data as triggered input. Loop execution time takes ~10us (measured using rt tick count). Thus It misses the samples. Am I missing something? What are the proper ways to acquire digital data in RT?
Also I am wondering whether I can use the SMB connector of 8820 controller as my acquision trigger input pulse. I am completely new to RT. Any help will be appriciated.
Thank you.

Hi jtele1,
To make sure that the data gets written in the correctly order I would recommend monitoring the Time Out of the write. If a time out occurs you could stop writing all FIFOs and then start when all the Time Outs are no longer there. Another option is to look at your host side and determine if you can read larger chunks of data at a time and allow the host side to deal with processing the data. An additional option would be to look into high throughput streaming for FlexRIO. In this setup you will be writing the data directly to disk on your host side and then you could process the data at a later time. I have linked an example below, this example was giving me trouble so please let me know if you have trouble loading this example. Depending on your situation these may not all be acceptable options but you will need to ensure that you are not filling any of your FIFOs. Lastly, from what I can tell you are using a Windows OS as your host and in that situation you have no way of controlling when your LabVIEW application gets processor time. If you were to switch to a Real Time controller you would be able to ensure when certain tasks are run and add priority to tasks. Please let me know if you have further questions.
High Throughput Streaming
https://decibel.ni.com/content/docs/DOC-26619
Patrick H | National Instruments | Software Engineer

Using PXI 6711

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